aide lumineuse primaire

CONT: Les aides lumineuses primaires sont des feux d'atterrages côtiers dotés de caractéristiques particulières pour aider le navigateur à déterminer son emplacement exact.

CONT: A major light is a very high-intensity light exhibited from a fixed structure or an offshore marine site. [It is] never located on floating aids to navigation.
CONT: All lighted aids to navigation are either major or minor lights, where major lights are used for key navigational points along sea-coasts, channels and harbour and river entrances. These lights are normally placed in lightships, lighthouses and other permanently installed structures, providing both high intensity and high reliability of the lights.